Reference Label	Details
note unc	The quoted uncertainty appeared to correspond to one std dev. and was multiplied by 2 to come closer to the desired 95% confidence limit
Crofton 1989	M. W. Crofton, R. S. Altman, N. N. Haese, and T. Oka, J. Chem. Phys. 91, 5882-5886 (1989) Infrared Spectra of 4HeH+, 4HeD+, 3HeH+, and 3HeD+